Anvil for stapling devices



April 5, 1938. w. G. PANKONIN ANVIL FOR STAPLING DEVICES Original FiledJune 21, 1934 1 N VENT OR. W/m/w G. PA/v/m/w/v ATTORNEY.

w h w] mmxm 3 w n ul 1111111111111111 a H i -m mm 5 Wm I l 1 I 11Patented Apr. 5, 1938 UNITED STATES PATENT OFFICE Original applicationJune 21, 1934, Serial No.

731,609. Divided and this application October 5, 1936, Serial No.103,981

6 Claims.

This invention relates to an improvement in staple deforming anvils forstapling devices.

The present application is a division of the copending application ofWilliam G. Pankonin, ap-

plicant herein, Serial No. 731,609, filed June 21,

1934, for stapling device.

One of the objects of this invention is to provide an anvil which may beused with a stapling device to deform staples as they are driven in lo avariety of different deformations.

Another object is to provide a device of this character whereinrelatively and independently movable staple deforming dies are providedfor each legof the staple, and wherein there is means l") for separatelylocking said dies in selected positions.

Other objects and advantages reside in certain novel features of theconstruction, arrangement and combination of parts which will behereinafter more fully described and particularly pointed out in theappended claims, reference being had to the accompanying drawing forminga part of this specification, and in which:

Figure 1 is a view partly in front elevation and is partly in sectionwith parts broken away for sake of clarity and illustrating a staplingdevice incorporating a staple deforming anvil embodying the presentinvention;

Figure 2 is a detail in plan view of the anvil shown in Figure 1;

Figures 3, 4 and 5 are side views illustrating staples deformed in saidanvil when in different selected positions;

Figures 6 and 7 are top and end views, respectively, illustrating astaple deformed by said anvil when in another position;

Figures 8, 9 and 10 are top views illustrating other deformations of thestaple possible with an anvil embodying the present invention;

Figure 11 is a plan view in fragmentary detail illustrating amodification of the supporting and locking means for the anvil dies;

Figure 12 is a detail view in transverse section showing the lockingmeans for use in the modi- 43 fication shown in Figure 11; and

Figure 13 is a plan view in fragmentary detail showing a. furthermodification of the supporting and locking means for the anvil dies.

Referring to the drawing, the anvil structure is positioned on the base20 near its front end and in substantial vertical alignment with thepath of staples as they are ejected by the staple driving mechanism. Theanvil comprises two rotatable anvil dies 2|, the axis of rotation ofeach die being concentric with the axis of the leg of a staple which isdischarged thereagainst for deformation. Each die 2| has a radiallydisposed clinching seat 22, a clip section of which is axial of thestaple leg to be deformed thereby. The seat 22 is slightly longer thanthe radius of the die 2|.

Each rotatable anvil die 2! may be adjusted to a plurality of positions.For example, the elongated radial seats 22 in the two dies may bearranged in alignment. Either seat may be rotated relatively to theother so that the two seats may be positioned in a plurality of angles.Both seats 22 may be shifted with equal facility. The positions obtainedby such adjustments provide a variety of staple deformations such as areillustrated in the drawing.-

If the seats 22 are in alignment and pointed inwardly, the staple isdeformed by turning both legs under the bridge (Figure 3); if one seat22 points to the front and the other seat 22 points to the rear of themachine, the result will be a Z-shaped staple such as is shown inFigures 6. and 7; if the seats are in alignment but pointed outwardlythe result will be an elongated member which may be readily withdrawnfrom the stapled papers in either direction as is illustrated in Figure4; if one seat 22 is pointed inwardly and the other outwardly while thetwo are in alignment, then a hook ended staple such as is shown inFigure 5 is obtained; two other deformations intermediate the form shownin Figures 6 and 10 are shown in Figures 9 and 10; and when both seatsare pointed outwardly and in parallelism but not in alignment, theresult will be a readily removable staple of sinuous configuration suchas is shown in Figure 10. Other results may be obtained by adjustmentsdifferent from those hereinabove suggested.

Several manners of mounting the anvil dies 2i on the base 20 are shown.In one of these, Figures 1 and 2, the dies 2| rotate in seats 23 inwhich they are pivoted. Each anvil 22 is keyed to a flanged sleeve 25having a notched periphery 26. A screw 24 extends through the sleeve 25into the bottom of the anvil 22 and provides a necessary connectionbetween these parts to lock the anvil at the top and the sleeve 25 atthe bottom of the base in a readily rotatable manner. The screw 24 isforced home only so far as is necessary to maintain the parts inassembly without undue frictional binding of the anvil and sleeve uponthe base 20.

To the rear of each notched sleeve 25 and between said two sleeves, asis lllustrated in Figures 1 and 2, there is an L-shaped anchor 21 whichis by gripping the anvils 2i at their edges which are knurled for thispurpose or by gripping the sleeves and then rotating such part or parts.

A second method of attaching an anvil die and a different attachingmeans are shown in Figures 11 and 12. In the base 20b shown, there is anoctagonal aperture 32. Depending from the anvil ND is an octagonal shank33 formed as an integral part of the base of the anvil die or suitablyattached thereto. The shank 32 terminates in a threaded section 34. Theaperture 32 in the base 20b to receive the octagonal shank 33 andthreaded portion 34 may be wholly octagonal as shown in Figure 11 or itmay be modified to have a circular section for the threaded member andan octagonal seat for the octagonal member. (See Figure 13.)

At the end of the threaded section 34 there is a wing nut 35 andintermediate the engaging face of the wing nut 35 and the base 2012there may be a washer 35a of suitable character. The washer 35a may beomitted when the aperture 32 is modified as shown in Figure 13. Theanvil 2ib is disposed in the octagonal aperture 32 with the stapledeforming seat 22b in the anvil Zlb in a selected position. Tighteningof the wing nut 35 on the threaded section 34 firmly seats the anvil M bagainst rotation or displacement until a change in adjustment isdesired.

While constructions in which this invention may be embodied have beenshown and described, it is to be understood that these constructionshave been selected merely for the purpose of illustration and thatvarious changes in the size,

shape and arangement of parts may be made without departing from thespirit of the invention or the scope of the subjoined claims.

The invention claimed is:

'1. An anvil for a stapling device, comprising a plurality 01' dies eachprovided with a clinching seat. said seats being radially disposed withrespect to the leg of a staple to be driven thereagainst, and means forindividually adjusting said seats in a variety of selected positions.

2. Staple deforming anvils, said anvils each being rotatable on an axiscoincident with the axis of the leg of a staple to be driventhereagainst, and means for mounting said staple deforming anvils forrelative movement about their respective axes.

3. An anvil for use with a stapling device, comprising a plurality ofdie members each provided with a staple clinching seat, separatemounting means for each of said members, said members being adjustablein their respective mounting means whereby they may be placed in aplurality of positions to obtain difierent setting of each clinchingseat relative to other clinching seats.

4. In a stapling machine, a ham member, a plurality of hexagonalapertures in said base, and die members for said apertures, each of saiddie members having a staple clinching seat adapted to engage and deformone leg of a staple to be driven thereagainst, each of said membershaving an octagonal shaft fittable within said aperture.

5. In a stapling machine, a base member, a pinrality of seats in saidbase, die members rotatable in said seats, each of said die membershaving a staple clinching seat adapted to engage and deform one leg of astaple to be driven thereagainst, each of said members having a notchedperiphcry, and spring means engageable with said notched periphery.

6. An anvil for deforming the legs of a preformed staple as it is driventhereagainst, comprising a die member for each leg of said staple, eachdie member having a clinching seat to engage and deform the respectiveleg of the staple, and means for mounting the die members to permit eachclinching seat to be separately adjustable whereby different settings ofthe legs of the staple relative to their bridge portion is obtained.

WILLIAM G. PANKONIN.

